Rotary engine, pump, and the like



May 19, 1936. J F R so, 5R 2,041,121

' ROTARY ENGINE, PUMP AND THE LIKE I Filed July 20, 1954 5 SheetsSheet"lJ FIELYGSO May 19, 1936. J E 5 2,041,121

ROTARY ENGINE, PUMP AND THE LIKE Filed July 20, 1934 3 Sheets-Sheet 2 JWa 8 J. FARESO, SR

ROTARY ENGINE, PUMP AND THE LIKE May 19, 1936.

Filed July 20, 1954 3 Sheets-Sheet 3 Qfl w, 0% W o S w T o 0 ORV/v. M 0\l7 1 3M V J0 F J x 1 I M1. 1d & M Q H E o O. 4 P? Patented May 19, 1936UNITED STATES PATENT OFFICE John Fareso, Sr., North Kensington, London,England Application July 20, 1934, Serial No. 736,267 In Great BritainJuly 20, 1933 7 Claims.

This invention relates to rotary engines or pumps of the kind whichemploy a rotary piston member operating in an annular chamber incooperation with an abutment member which seals the chamber duringrotation of the piston so as to prevent communication between the outletand inlet ports and provide the working chamber.

The object of the invention is to provide an improved engine of theabove kind which is efficiently sealed against leakage.

The invention accordingly consists in the features to be hereinafterdescribed or indicated and claimed.

In the accompanying drawings,

Figure 1 is an inside elevational side view of one form of engineaccording to the invention,

Figure 2 is an outside elevational side view of the engine illustratedin Figure 1,

Figure 3 is a section through the line 3-3 of Figure 2 looking in thedirection of the arrows,

Figure 4. is an end view of Figure 1 with the top part of the casingbroken away,

Figure 5 is a sectional plan on the line 5-5 of Figure 1, 1

Figure 6 is an inside elevational View of a modified form of engine,

Figure '7 is a section on the line 1-1 of Figure 6,

Figure 8 is an inside elevational view of a further modification,

Figure 9 is a fragmentary sectional view of a detail, and

Figure 10 is an outside elevational view showing a modified drivingarrangement.

In carrying the invention into eifect in one convenient manner asillustrated in the drawings there is provided a rotary engine, or pump,comprising a rotary member I having a substantially radially arrangedvane or piston element 2 which operates in an annular chamber 3 formedwithin the casing 4 and co-operates with an oscillatory shutter member 5(Figures 1 to 5) carried upon a spindle 6 within a chamber 1.

The shutter is formed with an arcuate portion 5 which is guided formovement into and out of the annular chamber 3 by having its oppositeends arranged to engage within arcuate slots 5* formed in the opposedend walls 3 of the casing. The arcuate shutter portion is arranged topass between the inlet and exhaust ports HI and II respectively in thecasing 4 so that when the shutter is in the closed position these portsare isolated from one another.

The arcuate portion of the shutter is fitted, around the bottom and theside edge portions thereof which extend into the annular chamber 3 uponmovement of the shutter, with a sealing plate 5 which is of U-shape(Figure 4) and is resiliently held within recesses in the said shutteredges by springs 5 seated within such recesses so as to lie against andbehind the sealing plate. A further sealing plate 8 may be fitted uponthe front face of the arcuate shutter portion 5 so as to provide a sealbetween the shutter face and the adjacent side of the slot 9 in thecasing through which the shutter moves. This sealing plate 8 is alsoheld Within a recess in the said shutter face and is resiliently seatedwithin the recess.

Movement of the shutter at the appropriate moments may be arranged totake place by any suitable means and in the particular example shownthis is effected by a pair of cams l2, upon the shaft I5 carrying therotary piston 2, engaging with the free ends of a pair of rods I3arranged on either side of the casing 4 and connected at their otherends with links M attached to the spindle 6. The arrangement is suchthat during each rotation of the shaft l5 the cams thereon engage withthe ends of the rods l3 and lift the same against the action of springsIE to lift the shutter and so move the arcuate portion 5 thereof out ofthe annular chamber 3 and this opening movement of the shutter is timedto take place immediately before the piston 2 reaches the path of thearcuate shutter portion; when the piston moves past the shutter path thecams leave the rods l3 and the shutter immediately closes by the actionof the springs Hi.

In the construction according to Figures 6 and 7 the rotary abutment IIhas arecess l8 into which the piston 2 enters without contact actuallytaking place between the piston and the recess.

The two rotary elements I and I! are geared together by gears l 9, 20,as shown in Figure 7 or, as shown in Figure 10, they may each be gearedto a common driven shaft 2| by means of bevel gears 22 so that the drivemay be taken equally from each rotary element.

In the construction according to Figure 8 the rotary abutment member I!is provided with a radial piston 23 adjacent to the recess l8 and whichpiston enters a similar recess 24 formed in the rotary member I adjacentto the piston 2.

The piston 2 is provided with means for efiecting a fluid-tight sealbetween it and the walls of the chamber 3 and such sealing means mayconsist of a pair of slides which are normally urged, by springs 26 forexample, into contact with these walls. Each slide is formed with aportion 25 recess and serving to maintain a fluid-tight oint whichengages within a groove in the outer peripheral edge portion of thepiston and another portion which engages within a groove in the adjacentside of the piston. Connected with each slide is centrifugal means forreducing the pressure of the slides on the walls of the annular chamber3 at elevated speeds of rotation of the rotary member I. Suchcentrifugal means consist of a weight 21, arranged within the rotarymember I on the side of the axis thereof opposite to that where thepiston 2 is located, and flexible connections 28 between the said weightand the portions 25 of the slides whereby both a retraction of theslides from the cylindrical wall of the annular chamber 3 and a decreasein the effective width of the slide may be effected by the centrifugalforces generated at high speed which forces may be controlled by aspring 29 connected between the outer end of the weight and the rotarymember I.. To prevent the slides from moving outwardly when the pistonenters the recess 18 (Figures 6 and '7) the portions 25 of the slidesmay be formed with lateral extensions 25 which engage with an annularslot 33 in the chamber walls.

A similar centrifugally controlled seal is provided upon the piston 23of Figure 8.

To ensure fluid-tight contact between the end walls of the rotary memberI and the adjacent walls of the chamber 3 the latter may be fitted withannular plates seated upon springs 3| within annular recesses in thesaid chamber walls. A similar sealing ring is provided for engagementwith the end walls of the rotary abutment member 11.

. In the construction according to Figures 6 and '7 a sealing plate 34may be provided within a recess in the portion of the casing withinwhich the rotary abutment member I"! rotates, this sealing plate beingresiliently seated within the between the cylindrical wall of saidmember and the casing.

To counteract any reduction in pressure in the annular chamber 3 belowatmospheric pressure the chamber may be fitted with a suction valve 32adapted to open when the pressure falls below atmosphere.

I claim:

1. In a rotary engine having a rotary piston adapted to operate in anannular chamber in cooperation with an abutment which seals the chamberduring rotation of the piston so as to prevent communication between theoutlet and inlet ports and provide the working chamber, the

combination therewith of means associated with the piston member andmovable relatively thereto for maintaing a seal between the walls of theannular space and the piston member, said means including centrifugalmeans operable to reduce the sealing pressure on the walls of theannular space at elevated speeds of rotation of the rotary member, andmeans for counteracting any reduction in pressure in the annular spacebelow atmospheric pressure.

2. A rotary engine according to claim 1 wherein the means associatedwith the piston comprises a slide conforming to the walls of the annularchamber and movable within a slot in the piston.

3. A rotary engine according to claim 1 wherein the means associatedwith the piston comprises a slide conforming to the walls of the annularchamber and movable in a slot in the piston, adapted normally to urgethe slide parts into contact with the cylindrical wall of the annularchamber.

4. A rotary engine according to claim 1 wherein the means associatedwith the piston comprises a slide conforming to the walls of the annularchamber and movable in a slot in the piston, said slot being conformedin two parts so that the slide is capable of extension to ensure contactof the sides of the slide with the circular walls of the annularchamber, and resilient means adapted normally to urge the slide partsinto contact with the cylindrical wall of the annular chamber.

5. A rotary engine according to claim 1, wherein the centrifugal meansoperates by virtue of a weight arranged on the side of the axis ofrotation of the rotary member opposite to that of the piston.

6. A rotary engine as claimed in claim 1, wherein the means associatedwith the piston comprises a slide conforming to the walls of the annularchamber and movable in a slot in the piston and a weight is connected tothe slide so that both a retraction of the slide from the cylindricalwall of the annular chamber and a decrease in the effective width of theslide may be effected by the centrifugal force generated at high speed.

7. A rotary engine according to claim 1 wherein means for counteractingany reduction in pressure in the annular chamber below atmosphericpressure consist of a valve in the wall o the annular chamber adapted toopen when pressure falls below atmospheric.

JOHN FARESO, SR.

